Sep 01 08:11:52.220 INFO checking rust-sort-0.1.4 against try#aa245a5862056b681d2ccdb178f58891108cd3a6 for pr-53831
Sep 01 08:11:52.220 INFO running: cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets
Sep 01 08:11:52.220 INFO running `"docker" "create" "-v" "/home/ec2-user/crater/./work/local/test-source/worker-2/pr-53831/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/source:ro,Z" "-v" "/home/ec2-user/crater/./work/local/target-dirs/pr-53831/worker-2/try#aa245a5862056b681d2ccdb178f58891108cd3a6:/target:rw,Z" "-v" "/home/ec2-user/crater/./work/local/cargo-home:/cargo-home:ro,Z" "-v" "/home/ec2-user/crater/./work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=500" "-e" "CMD=cargo +aa245a5862056b681d2ccdb178f58891108cd3a6-alt check --frozen --all --all-targets" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-m" "2G" "crater"`
Sep 01 08:11:52.398 INFO blam! b01a5f04385056c896f64dd17034e6db022786410c388360538ed25e46aeab28
Sep 01 08:11:52.399 INFO running `"docker" "start" "-a" "b01a5f04385056c896f64dd17034e6db022786410c388360538ed25e46aeab28"`
Sep 01 08:11:53.270 INFO kablam!     Checking rust-sort v0.1.4 (file:///source)
Sep 01 08:11:53.270 INFO kablam!     Checking utils v0.0.1
Sep 01 08:11:53.535 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 08:11:53.535 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:83:3
Sep 01 08:11:53.535 INFO kablam!    |
Sep 01 08:11:53.535 INFO kablam! 83 | #[experimental]
Sep 01 08:11:53.535 INFO kablam!    |   ^^^^^^^^^^^^
Sep 01 08:11:53.535 INFO kablam!    |
Sep 01 08:11:53.535 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 08:11:53.535 INFO kablam! 
Sep 01 08:11:53.536 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 08:11:53.536 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:77:3
Sep 01 08:11:53.536 INFO kablam!    |
Sep 01 08:11:53.536 INFO kablam! 77 | #[experimental]
Sep 01 08:11:53.536 INFO kablam!    |   ^^^^^^^^^^^^
Sep 01 08:11:53.536 INFO kablam!    |
Sep 01 08:11:53.536 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 08:11:53.536 INFO kablam! 
Sep 01 08:11:53.536 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 08:11:53.536 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:37:3
Sep 01 08:11:53.536 INFO kablam!    |
Sep 01 08:11:53.536 INFO kablam! 37 | #[experimental]
Sep 01 08:11:53.536 INFO kablam!    |   ^^^^^^^^^^^^
Sep 01 08:11:53.536 INFO kablam!    |
Sep 01 08:11:53.536 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 08:11:53.537 INFO kablam! 
Sep 01 08:11:53.537 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 08:11:53.537 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:29:3
Sep 01 08:11:53.537 INFO kablam!    |
Sep 01 08:11:53.537 INFO kablam! 29 | #[experimental]
Sep 01 08:11:53.537 INFO kablam!    |   ^^^^^^^^^^^^
Sep 01 08:11:53.537 INFO kablam!    |
Sep 01 08:11:53.537 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 08:11:53.537 INFO kablam! 
Sep 01 08:11:53.538 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 08:11:53.538 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/lib.rs:13:3
Sep 01 08:11:53.538 INFO kablam!    |
Sep 01 08:11:53.538 INFO kablam! 13 | #[experimental]
Sep 01 08:11:53.538 INFO kablam!    |   ^^^^^^^^^^^^
Sep 01 08:11:53.538 INFO kablam!    |
Sep 01 08:11:53.538 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 08:11:53.538 INFO kablam! 
Sep 01 08:11:53.538 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 08:11:53.538 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:63:3
Sep 01 08:11:53.539 INFO kablam!    |
Sep 01 08:11:53.539 INFO kablam! 63 | #[experimental]
Sep 01 08:11:53.539 INFO kablam!    |   ^^^^^^^^^^^^
Sep 01 08:11:53.539 INFO kablam!    |
Sep 01 08:11:53.539 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 08:11:53.539 INFO kablam! 
Sep 01 08:11:53.539 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 08:11:53.539 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:45:3
Sep 01 08:11:53.539 INFO kablam!    |
Sep 01 08:11:53.539 INFO kablam! 45 | #[experimental]
Sep 01 08:11:53.539 INFO kablam!    |   ^^^^^^^^^^^^
Sep 01 08:11:53.539 INFO kablam!    |
Sep 01 08:11:53.539 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 08:11:53.539 INFO kablam! 
Sep 01 08:11:53.539 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 08:11:53.539 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:37:3
Sep 01 08:11:53.539 INFO kablam!    |
Sep 01 08:11:53.539 INFO kablam! 37 | #[experimental]
Sep 01 08:11:53.539 INFO kablam!    |   ^^^^^^^^^^^^
Sep 01 08:11:53.539 INFO kablam!    |
Sep 01 08:11:53.539 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 08:11:53.539 INFO kablam! 
Sep 01 08:11:53.539 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 08:11:53.539 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:29:3
Sep 01 08:11:53.539 INFO kablam!    |
Sep 01 08:11:53.539 INFO kablam! 29 | #[experimental]
Sep 01 08:11:53.539 INFO kablam!    |   ^^^^^^^^^^^^
Sep 01 08:11:53.539 INFO kablam!    |
Sep 01 08:11:53.539 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 08:11:53.539 INFO kablam! 
Sep 01 08:11:53.539 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 08:11:53.539 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:21:3
Sep 01 08:11:53.539 INFO kablam!    |
Sep 01 08:11:53.540 INFO kablam! 21 | #[experimental]
Sep 01 08:11:53.540 INFO kablam!    |   ^^^^^^^^^^^^
Sep 01 08:11:53.540 INFO kablam!    |
Sep 01 08:11:53.540 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 08:11:53.540 INFO kablam! 
Sep 01 08:11:53.540 INFO kablam! error[E0658]: The attribute `experimental` is currently unknown to the compiler and may have meaning added to it in the future (see issue #29642)
Sep 01 08:11:53.540 INFO kablam!   --> /cargo-home/registry/src/github.com-1ecc6299db9ec823/utils-0.0.1/src/empty.rs:14:3
Sep 01 08:11:53.540 INFO kablam!    |
Sep 01 08:11:53.540 INFO kablam! 14 | #[experimental]
Sep 01 08:11:53.540 INFO kablam!    |   ^^^^^^^^^^^^
Sep 01 08:11:53.540 INFO kablam!    |
Sep 01 08:11:53.540 INFO kablam!    = help: add #![feature(custom_attribute)] to the crate attributes to enable
Sep 01 08:11:53.540 INFO kablam! 
Sep 01 08:11:53.540 INFO kablam! error: aborting due to 11 previous errors
Sep 01 08:11:53.540 INFO kablam! 
Sep 01 08:11:53.540 INFO kablam! For more information about this error, try `rustc --explain E0658`.
Sep 01 08:11:53.542 INFO kablam! error: Could not compile `utils`.
Sep 01 08:11:53.542 INFO kablam! warning: build failed, waiting for other jobs to finish...
Sep 01 08:11:53.777 INFO kablam! error: build failed
Sep 01 08:11:53.778 INFO kablam! su: No module specific data is present
Sep 01 08:11:54.314 INFO running `"docker" "rm" "-f" "b01a5f04385056c896f64dd17034e6db022786410c388360538ed25e46aeab28"`
Sep 01 08:11:54.395 INFO blam! b01a5f04385056c896f64dd17034e6db022786410c388360538ed25e46aeab28